- Ricker, D W
- Ricker, Everett W.
- Ricker, Martin
- Ricker, Percy Leroy, 1878-1973
- Ricker, William Edwin.
- Rickert Nurseries.
- Rickert, Corinna
- Ricketson
- Ricketson, J
- Ricketson, J M
- Ricketson, Jon M
- Rickett, C B
- Rickett, H W
- Rickett, Harold William, 1896-1989
- Rickett, Review By: H W
- Ricketts, C
- Ricketts, Howard Taylor, 1871-1910
- Ricketts, Matthew S
- Ricketts, Mitch
- Ricketts, Noble George, 1896-
- Ricklefs
- Ricklefs, R E
- Ricklefs, Robert E
- Rickles, Dean
- Rickles, F R
- Rickli, Fernanda Lessa
- Rickli, M
- Rickner, J A
- Ricks, John T.
- Ricks, Nathan
- Ricksecker, Alfred Edmund, 1869-1943
- Ricksecker, Edmund.
- Rickson, Fred R
- Rickson, Roy E
- Rico Hernández, Enrique
- Rico Martine, Roberto
- Rico, Farit
- Rico, J M
- Rico, Lina
- Rico, María R
- Rico, Pablo
- Rico, Rita
- Rico, Tatiana
- Rico, Víctor J.
- Rico-Arce, Maria de Lourdes, 1955-
- Rico-Cernohorska, Adriana
- Rico-G., Alejandro
- Rico-García, Enrique
- Rico-Gray, Victor
- Rico-Martínez, Fernando
- Rico-Martínez, R
- Rico-Mejía, Farit
- Rico-Sanchez, Axel
- Ridd, Merrill K.
- Riddall, J. B.
- Riddell, Gillian E.
- Riddell, J. A.
- Riddell, John Leonard, 1807-1867
- Riddell, John M.,
- Riddell, John R.
- Riddell, Newton N., 1862-
- Riddell, R.
- Riddell, Robert
- Riddell, W
- Riddell, William
- Riddell, William E
- Riddell, William Renwick, 1852-1945
- Riddick, E W
- Riddick, Eric W
- Riddiford, Lynn M
- Riddin, Megan
- Riddington, Maggie
- Riddle, Brett R.
- Riddle, J. B.
- Riddle, Jane R.
- Riddle, Kenton E.
- Riddle, Lincoln W.
- Riddle, Lincoln Ware, 1880-1921
- Riddle, Oscar, 1877-
- Riddle, Rebecca
- Riddleberger, K A
- Ride, W. D. L.
- Rideal, Samuel, 1863-1929
- Ridenbaugh, Ryan
- Rideout Avocado Nurseries.
- Rideout, A. R.
- Rideout, Dave
- Rider Nurseries,
- Rider Nursery & Floral,
- Rider Nursery.
- Rider, A.,
- Rider, Alexander, active 1810-1834
- Rider, D A
- Rider, David
- Rider, David A
- Rider, David A.
- Ridet, J M
- Ridet, Jean-Marc
- Ridewood, W C
- Ridewood, W G
- Ridewood, Walter George
- Ridewood, William George.
- Ridgaway, C. B.
- Ridge Nursery and Plant Farm.
- Ridge View Farm,
- Ridge, G H
- Ridgel, Gertrude C.
- Ridgely, R S
- Ridgely, Robert S
- Ridgely, Ryan C
- Ridge-O'connor, G E
- Ridgeview Glad Farm.
- Ridgeview Nursery.
- Ridgeville Nurseries, Inc.
- Ridgeway Farm (Jonesville, Va.)
- Ridgeway, Peter
- Ridgeway, William, Sir, 1853-1926
- Ridgewood Gardens.
- Ridgewood Nurseries.
- Ridgewood, N J
- Ridgway Ornithological Club.
- Ridgway, Charles S
- Ridgway, E. P.
- Ridgway, Elizabeth P.
- Ridgway, Frank.
- Ridgway, James
- Ridgway, John E
- Ridgway, John L., 1859-1947
- Ridgway, Mark S.
- Ridgway, R. L.
- Ridgway, Robert
- Ridgway, Robert
- Ridgway, Robert
- Ridgway, Robert, 1850-1929
- Ridgway., Robert
- Ridgways (Firm)
- Riding, D
- Riding, Douglas
- Riding, Robert
- Ridinger, Johann Elias, 1698-1767
- Ridler, W. F. F.
- Ridley, Annie E.
- Ridley, Glynis
- Ridley, H. N. (Henry Nicholas), 1855-1956
- Ridley, Henry Nicholas
- Ridley, Matthew White, 1925-2012
- Ridley, S O
- Ridley, Stuart Oliver Stuart Oliver Ridley 1853-1935
- Ridley, W J
- Ridley, William, 1764-1838
- Ridlon, H C
- Ridpath, George, 1726
- Ridsdale, C E
- Riebel, Franz
- Rieber, Charles H.
- Rieber, Ernst
- Riebesehl, Janett
- Riebesehl-Fedrowitz, J
- Riechers-Pérez, Alejandra
- Riechert, Susan E., 1945-
- Rieck, Hugh J.
- Rieck, Paul B.
- Riecke, Victor Adolph, 1805-1857
- Riecken, Uwe
- Rieckmann, B
- Ried, St. George.
- Riedel, A
- Riedel, Adolf
- Riedel, Alexander
- Riedel, B.
- Riedel, Chandra
- Riedel, D. W.
- Riedel, Jendrian
- Riedel, M P
- Riedel, Matthias
- Riedel, P.
- Riedel, Peter
- Riedel, Ralf
- Riediger, Wiviany
- Riedl, H
- Riedl, Harald
- Riedl, Robert
- Riedl, T
- Riedl, Tadeusz
- Riedl, Tadeuz
- Riedle, J. Daren
- Riedman, Ml
- Rieff, John P.
- Riefner, R E
- Riefner, Richard E
- Riegel Plant Co.
- Riegel, G T
- Riegel, Garland T
- Riegel, Gregg M
- Riegel, J A
- Riegel, Ricardo
- Rieger, Christian
- Rieger, Friedrich
- Rieger, Ingo
- Rieger, J. B.
- Rieger, J. B. 1886-
- Rieger, John Benjamin
- Rieger, Paulo J.
- Rieger, Paulo Juarez
- Rieger, Reinhard
- Rieger, Samuel, 1921-
- Riegert, Paul W
- Riegl, Bernhard
- Riegler, Markus
- Riegraf, W
- Riehl
- Riehl, Alois, 1844-1924
- Riehl, Amelia.
- Riehl, Christina Pauline, 1983-
- Riehl, E. A.
- Riehl, Herbert, 1915-
- Riehl, Torben
- Riehm, J P
- Riehm, John P
- Riehn, H
- Riehn, Helmuth
- Riek, E
- Riek, E F
- Riel, A
- Riel, P
- Rieman, Bruce E.
- Rieman, Bruce.
- Riemann, H
- Riemann, Hugo
- Riemann, Jana C.
- Riemann, John G
- Riemel, Emil
- Riemenschneider, C
- Riemenschneider, Don E.
- Riemis, A
- Riemis, Alex
- Riemsdijk, Thea van, 1885-
- Rienecker, Michele M.
- Rienks, Jane H
- Rienstra, John T.
- Rienzi, Louise, Mrs.
- Rieper, Hinrich, 1891-
- Rieppel, Olivier
- Riéra, Bernard
- Riera, Jesús
- Riera, Maria Dalila Forlano
- Riera, Rodrigo
- Ries, Edith H
- Ries, Harry J.
- Ries, Heinrich, 1871-1951